Answer: -1.25, 1.75, 4.75, 7.75, . . .
Each term is obtained by adding \(d\) to the previous term: \(t_1 = a\), \(t_2 = a + d\), \(t_3 = a + 2d\), \(t_4 = a + 3d\).
\(t_1 = -1.25\), \(t_2 = 1.75\), \(t_3 = 4.75\), \(t_4 = 7.75\)
So the A.P. is -1.25, 1.75, 4.75, 7.75, . . .